Does a safelink Sim card work on a jail broken iphone3gs?

I just got a safe link phone and a sim card i did not turn on the phone and only just took out the simcard and placed it into my jail broken Iphone3gs, My iphone just says No Service, and i already removed and installed UltraSn0w twice. Does this mean safelink does not work with iphone? Or am i doing something wrong?

Added (1). 10 points to whoever helps: D

Syluxx04.12.2012

Safelink is the same as tracfone. Tracfone sim cards work only with tracfone phones they were activated in. You cannot use your safelink sim card even with another safelink phone.